Excavating-machine



B. F. nu Pom. EXCAVATING MACHINE. APPLICATION FILED JULY 10, 1919.

I Patented Nov. 16,1920.

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" BENJAMIN F. DU PON'I, 0F DANIA, FLORIDA, ASSIGNOR 0F THREE-TENTI-IS TO WILLIAM F. WHITMAN, OF CHICAGO, ILLINOIS, AND THREE-TENTHS TO BOYD E. BAINEY, OF MIAMI, FLORIDA.

EXCAVATING-MACHINE.

Specification of Letters Patent. Patented N 16" 1920 Application filed July 10, 1919. Serial No. 309,849.

chines, and more particularly to machines or apparatus ofthe type utilizing an eXc'a-* vatingbucket.

One of the objects of this invention, therefore, is to provide an excavating machineutilizing the pivoted bucket which is so con;

structed, arranged and .mounted as fto be adapted 'for efiecti-ve. control.

Another ob ect is to provide means for" controlling the movement of the bucket carrier by means of cables.

Further objects will appear from the detail description taken in connection with the accompanying drawings, in which: Y

Figure 1 is a side elevation of an excavatin machine embodying this invention;

vT ig. 2 is a detail plan view showing more particularly a plan of the bucket carrier and its operating connections;

Fig. 3 is a detail plan on somewhat an'enlarged scale of the bucket and a part of its carrier; and

Fig. 4 is a side elevation of. the same; and

Fig. 5 is a section on the line 5-5, Fig; 2.

Referring to.the accompanying drawings, 1 designates a base which may be mounted for movement toward and from the cut in the usual manner and which carries the driving and operating mechanism as is usual in machines of this type. Mounted on this base is the usual turret 2 on which is pivot:

ally mounted a boom 3 which is connected at its upper end by a tie 4 provided with the usual turn buckle 5 to the strut Ginounted on the base and braced by suitable ties or braces 7 from the base 1.

Mounted on the base is an elevatlng and -controlling mechanism comprising cable drums 8, 9 and 10, each drum being providedwith a worm gear 11 meshing withQa worm 12 and each worm being adapted for connection with a shaft 13 by means ofa clutch is. The connections between the shaft 13 and the drums 8, 9 and 10 are preferably of the reversing type but as these driving connections are well known to those skilled in the art, a detail description thereof 1s unnecessary.

Mounted in a bracket 20 on the boom 3 is a shaft 21. This shaft has pivotally mount-- ed at each end thereof a pair of spaced triangular plates 22 which are retained against endwise movement by means of collars 23. The-shaft has mounted thereon and between pairs of plates 22 rolls 24 and mounted also between each pair of plates and on the "shanks of bolts 25 are rolls 26. There ,is

thusformed between each pair of plates ia" guide way bounded on its 'lower side jbyfla roll 24 and 'atits uppen'side byapairpf,

proper relation.

The bucket carrier comprises spaced side or handle members 27 connected at their ends and held in spaced relation by lower plates 28 and upper plates 29. These side or handle members are mounted in the guide ways formed in the pairs of spaced plates 22 so that the carrier willbe guided for [slidable movement with respect to the boom 3 but can also bemoved in a pivotal relation in-any position.

Mounted on the handle and at the opposite ends'thereof are sheaves 30 and 31, these sheaves being mounted. between the upper plates 29 and bearings 32 secured to the plates, and on shanks 33 passing through these bearings and the plates 28 and 29. Sheaves 34 and 35 are loosely mounted on the 'shaft 21' and spaced from a pair of plates 22 and from the'bearing 20.

A cable 36 has one end connected to one of the cross bolts 37 and passes thence over the sheave 30, to and over the sheave 34,

thence under one of the sheaves 390 to the.

drum 10. It is wound several times about the drum 10 -and then passes back over the sheaves 390, 35,, and 31, and is then connected to the other cross bolt 37. The construction. is, therefore, such that rotation ofthe.. drum 10 inany selected directionwill slide the carrier in the-required direction on the boom and when the drum 10' is at rest and ibraked, the handle will be retained in the selected position. Referring now more particularly to'Figs. 3 and 4, the carrier 27 has secured thereto a pair of side members 39 which are spaced to receive the bucket 40. This bucket is in the 1011926. The collars 23 aref-of'course, time to the shaft 21jso as to secure the parts in .form of half a cylinder and is pivoted intervided' with brackets 44 feach embodying spaced lugs connected by a cross'pin or rivet 45 for receiving the ends of cables 46. Each cable is connected with a drum 47 fixed to a shaft 48 mounted to rotate in the side members and retained in position by collars 49. The shaft 48 has fixed thereto a sheave or drum 50 with which is connected a cable 51 passing around a guide sheave 52 mounted on a shaft 53between the side members passing over a sheave 54 and the end'of the boom, over a guide sheave 55 on the strut 6 and around the drum 8.

The brackets '44 have stops adapted to engage a cross-bar 57 on and connecting the side members 39.

A bail 58 is pivotally connectedat its lower 'ends by pins 59 with the bucket, the connection being intermediate the center and the lagging edge of the bucket and somewhat bex low' the upper edge of the bucket. This bail is arranged to clear the side members and is connected at its upper end with a cable 60 passing through a sheave like 54- on the end, of the boom under a sheave 61 on the strut 6 and wrapped around the drum 9.

When a pull is applied to the cable 51 and the cable 60 is released,,,the connection 0f the cable 51 with the sheave-or drum 50 will operate to rotate the shaft 48soas to wind the cable 46 on the drum 47 thereby rotating the bucket and on its trunnions or axis from the position shown in full lines, Fig. 1, to the position shown in dotted lines, the rotative movement being stopped when the lugs or stops 56 engage the cross bar 01 shaft 57, Fig. 4. The drums 47 are made somewhat smaller than the drum 50 in order that the pull on the cables 46 shall be greater than the pull on the cable 51 thereby insuring positive and complete rotation of the bucket to the position shown in Fig. 4 before the. carrier 2'? begins to rise. When in the position of' the parts shown in Fig.

4, pull is applied to the cable 60 and the cable 51 is released, the bucket will be swung on its trunnion from dotted line position, Fig. 1, to full line position. It'will, of course, be understood that when the bucket is in the position shown in Fig. 1 (dotted lines) and the cable 51 is released,

the weight of theparts will cause rotation of the bucket on its trunnions so as to move the bucket from dotted to full line osition on its carrier, It will also be un erstood that on account of the relative positions of* the pivots 59 and 42 (Figs. 3 and 4) the inverted position of the bucket will be such as to insure complete discharge of its contents. If after the cable 51 has been tensioned to rotate the bucket to the position shown in Fig. 4, tension is now applied to both cables 51 and 60, the bucket will be raised together swinging about change the direction of action of the cable- 51, but would not. alter of the bucket. v

The sheaves .390, 55 and 61 are mounted folrotation between stirrups 62 which are pivotedon transverse axis 63 on brackets 64 attached to the strut 6. The centers of the .sheaves' are substantially coaxial with the center 65 of the turret 2. Accordingly the parts will be in properposition irrespective of the position of the boom 3 in a transverse direction; It is, of course, to be understood that theturret 2 hassuitable mecha- IllS111 (not shown) for adjusting it so as to adjust the position of the boom, and since this mechanismmay beof well known construction, a detail description thereof is unnecessary.-

its positive rotation In the operation; of this machine, the frame, the boom and the bucket carrier are so adjusted that the scoop bucket is allowed to reach the bottom of the cut as shown in F ig. 1 when the bucket is in position as shown in full lines. In'this position cable 60 is slackened or released. Pull is now applied to the cable 51 'while the bucket rests on the bottom of the cut and this will cause the bucket to turn on its trunnions so as to be filled with the material. After the bucket has been turned to the position shown in F ig..4, the operator will hoist on both cables 51 and 60, thereby moving the bucket and its carrier to dotted position.- The operator will now swing the boom to dumping position, and he will then release the cable 51 while the cable 60 is held stationary or.

it comes to the end of its movement when the base is moved onward.

It will, therefore, be seen that the invention accomplishes its objects. The machine is not only simple in construction, but efgears or fine mechanical parts exposed to the sand and other material to be excavated. The bucket carrier on account of the cable connections by which it isoperated can have a very long sweep so "that minimum movement of the base is required. On account or" the bail connections for dumping the bucket, the bottom of the bucket exposed to and working in the material is entirely free and there is no cable or projecting part which is subject to hindrance 'or wear.

It is obvious that various changes may be made in the details of construction without departing from the spirit of this invention; it is, therefore, to be understood that this invention is not to 'be limited to the specific construction shown and described.

Having thus described the invention, what is claimed is:

1. In an excavating machine, a boom, a carrier mounted for movement thereon, a bucket pivoted on said carrier, means reacting on said carrier for positively rock ing saidbucket on saidrcarrier, and for mov-' ing said carrier. 7

In an excavating machine, a boom, a carrier mounted for movement thereon, a bucket pivoted on -said carrier, means reacting on said carrier for positively rocking said bucket on said carrier in order to fill said bucket, and for afterward moving said carrier and the filled bucket thereon.

3. In an excavating machine, a boom, a carrier mounted for swinging movement thereon, a bucket pivoted on said carrier, means reacting on said carrier for positively rocking said bucket on said carrier, and for swinging said carrier.

4. In an excavating machine, a boom, acarrier mounted for slldlng movement there on, a bucket pivoted on said carrier,'means reacting on said carrier for positively rocking said bucket on said carrier, and means for sliding said carrier.

5. In an excavating machine, a boom, a carrier mounted for swinging and sliding movement thereon, a bucket pivoted n said carrier, means reacting on said carrier for positively rocking said bucket on said carrier, d fterward 'sWlIlglIlg said carrier and means for sliding said carrier.

6. In an excavating machine, a movably supported carrier, a bucket pivoted intermediately on said carrier, mean reacting on said carrier for rocking said bucket in order to fill the same, means for moving said carrier and the filled bucket thereon away from the excavatiomand means for rocking said bucket in order to discharge its contents.

7 In an excavating machine, a bucket carrier, a bucket pivoted intermediately on said carrier, a cable attached tothe lagging edge of said bucket, a cable drum adjacent said bucket, engaged by said cable and adapted to control the rocking of saidbucket.

8. In an excavating machine, .a bucket carrier, a bucket pivoted intermediately on.

said carrier, a cable attached to the lagging edge of said bucket, a cable drum adjacent sald bucket adapted to control the rocking of said bucket, a shaft for said drum, and an operating connection to said shaft, adapted to rock said bucket in order to fill the same.

9. In an excavating machine, a bucket carrier, a bucketpivoted on said carrier, a cable drum adjacent said bucket, and cable connections to said drum and to said bucket,

adapted to positively rock said bucket to fill the same and thereafter move said carrier.

10. In an excavating machine, a bucket carrier, a bucket pivoted on said carrier, a cable drum on said carrier adjacent said bucket, and cable connections to said drum and t said bucket, adapted to positively rock said bucket: to fill the same and thereafter move said carrier.

11.- I n excavating machine, abucket.

carrier, a bucket pivoted intermediately on said carrier, and connections to the lagging side of said bucket adapted to rock the same carrier, a bucket pivoted intermediately on said carrier, ocking connection to the lagging edge of said bucket, and a second rocking \connection the same side of said bucket.

14. In an excavating machine, a bucket carrier, bucket pivoted intermediately on 1 said carrier, a rocking connection to the lagging edge of said bucket, and alifting' and rocking connection the same side of said bucket.

In testimony whereof I" aflix my-signature this 3rd day of July, 1919.

' BENJAMIN F. DU PONT. 

